these 3 derivations will be built:
  /nix/store/fdzbcgx3025y59ircm4wqs6wyilk40jd-clan-cli-source.drv
  /nix/store/alb5cgyg87n6ll35l5g89nv0xcm3fbac-clan-cli.drv
  /nix/store/hwv6c75syhpb1xwki7pzfa2c4vc36993-nix-shell.drv